Fan



FIG. 1 is a perspective view of a fan;

FIG. 2 is a first side view of the fan of FIG. 1;

FIG. 3 is a second side view of the fan of FIG. 1; and,

FIG. 4 is a bottom view of the fan of FIG. 1. 

I claim the ornamental design for a fan, as shown and described. 